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Method and device for rapidly measuring gas content of coal seam

A technology for rapid measurement of coal seam gas, applied in the direction of analyzing materials, instruments, etc., can solve the problems of cumbersome steps and high time cost, and achieve the effects of simple operation, simple method and shortening of the measurement period.

Inactive Publication Date: 2021-05-28
江苏东科安全研究院有限公司
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Problems solved by technology

The gas content determined by the direct method is mainly composed of five parts: downhole loss, downhole desorption, uphole desorption before pulverization, uphole pulverization desorption and normal pressure non-desorption. It takes 3 to 4 hours of continuous observation to complete, and the operator needs to have certain professional knowledge when calculating the loss according to the desorption law

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  • Method and device for rapidly measuring gas content of coal seam
  • Method and device for rapidly measuring gas content of coal seam
  • Method and device for rapidly measuring gas content of coal seam

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Embodiment Construction

[0057] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0058] A kind of method of quickly measuring coal seam gas content of the present invention, concrete steps are as follows:

[0059] a. Before going into the well, clean and weigh the crushing device without coal samples, record it as the weight m 1 , after going down the well, take coal samples downhole and put them into the crushing chamber 3 of the crushing device, turn on the pressure sensor 4 at the same time, drill at the test site selected in the downhole and lower the coring casing to take coal samples, and select coal with relatively large particle size Put 300-500g sample into the crushing device and seal it. At the same time, use a special stopwatch to start timing when the coal is seen, and record the temperature and atmospheric pressure with an aneroid barometer, and record the time t from when the coal is drilled to see the coal sample into th...

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Abstract

The invention discloses a method and device for rapidly determining the gas content of a coal seam, and belongs to the technical field of coal mine safety. A crushing device is adopted, and in the process of taking a coal sample underground, the time from coal drilling to loading of the coal sample into the crushing device, temperature and atmospheric pressure parameters are recorded through a pressure sensor; after well lifting, the crushing device filled with coal samples is installed on a weighing device for crushing, the weights of the coal samples in different stages are weighed through the weighing device, the gas density serves as a bridge, the gas volume is calculated through the weight change value, and the content of desorbed gas in the crushing process is calculated; the problems that an existing gas content measuring technology is complex in method and high in time cost are solved. The device is simple and convenient to operate, high in practicability, time-saving, labor-saving, low in cost and capable of quickly and accurately measuring the coal seam gas content.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, in particular to a method and a device for quickly measuring the gas content of coal seams for on-site gas measurement in coal mines. Background technique [0002] In the field of coal mine safety, the gas content of coal seams has always been considered as one of the important parameters to reflect the risk of gas outburst at the site, and it is also an important basis for predicting the amount of gas emission in mines and judging whether the gas drainage is up to standard. At present, the method of on-site measurement of coal seam gas content at home and abroad is mainly the direct method, that is, the coal core is drilled on site, and the on-site desorption measurement is carried out. The gas content determined by the direct method is mainly composed of five parts: downhole loss, downhole desorption, uphole desorption before pulverization, uphole pulverization desorption and normal pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/14
CPCG01N7/14
Inventor 王海锋耿帅康王海梅商政张晓刘昶郝晓锐陈平
Owner 江苏东科安全研究院有限公司
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